TATTU 4S 1300mAh LiPo Battery 75C 14.8V Pack with XT60 Plug is a highly recommended battery for 5" FPV racing or acro flying! and it enjoys a good reputation among the FPV pilots, since it stays cool after heavy use, has the aluminum plate surrounding the cells on top and bottom (large sides) in case of a crash, and has great power output. It is a perfect size for 180mm to 260mm class.